Bearing-adjuster.



J. T. HAY.

BEARING ADJUSTER.

APPUCATION FILED 1UNE8. 19141 2 SHEETS-SHEET1.

Patented Sept. 21, 1915.

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' .I. T. HAY.

BEARING ADJUSTE APPLICATION FILED JUNE 4 1,154,512. Patented Sept. 21,1915.

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COYLUMBIA PLANOGRAPH c0" WASHIN GGGGGGG c JOHN T. HAY, OF UNION CITY,OHIO.

BEARING-ADJUSTER.

Specification of Letters Patent. Patented Sept. 21, 1915,

Application filed L1 une 8, 1914. Serial No. 843,731.

To all whom it may concern:

zen of the United States, residing at Union City, in the county of Darkeand State of Ohio, have invented certainnewand useful Improvements 1nBearing Ad usters, of

which the following is a specification.

The object of this invention is automatically to so adjust thebearing-brassesof a.

cross-head pin or crank-pin of a pitman in proportion to the wear of anyone or all of the brasses as to maintain a given tightness of journalsat both-ends of the pitman and to simplify and make more positive themechanism heretofore used for that I purpose. f V 1 The object, also, isto provide means. for correcting looseness due to the spring of themetal in said automatic takeup mechanism.

I accomplish the above and other objects which will hereinafter appear,by the mech anism illustrated in. the accompanyingdrawings, in. whichFigure 1 is a view 111 side elevation and partial vertical section of apitman with my invention in operative position for adjusting thebearing-brasses at the cross-head pin andcrank-pin of a pitman, thelever contact of the operative mechanism being against the cross-headpin in this illustration. Fig- 2 is a crosssection onthe'line 2-2 ofFig. 1. Fig. 3 is a. section on the line 33 of Fig. 2. 'Fig. 4e'is aside elevation of a modified, form wherein only one bearing leveragainst thepin, is used, and Fig. 5 is a cross section on the line 55 ofFig. 4. 'f -i Like characters of reference indicate like partsthroughout the several views of the drawings.

In a steam-engine, because the expansive action of the steam is exertedagainst both sides of the piston, that is, in alternate oppositedirections, it ,is' necessaryto apply the automatic journal-box take-upat the cross-head pin of a pitman, but with internal combustion engineswhere the driving impulse is only againstone side of the piston or inone direction,, the automatic journal-box take-up maybe applied at thecrank-pin. In the drawings I have shown the automatic take-up mechanismas being operated by contactw-ith the cross-head pin,

as for steam-engines, but this is only by way of illustratiomand it willbe understood that 1 for internal combustion'engines thejcontact j ofthe automatic mechanism may be against Be it known that I, JOHN T. HAY,a citi-.-

the crank-pin at the other end of the pitman.

The cross-head pin at is mounted between the journal-brasses 5 and 6,and the crank pin 7 is similarly mounted between thejournal-brasses 8and 9. The brasses 5 and 6 are mounted between the stem-members 10 of astirrup, the outer ends of which stem- 14 thereby completing the frameor body portion of the pitman. All of the brasses 5, 6, 8 and 9 havea'close sliding fit between their adjacent pair of stem-members, 10 and12' respectively, and it will be noted that the brasses are shorter thanthe diameters of the pins with which they respectively contact, so thatall of the material on the sides of'the brasses against the respectivepins eland 7 will be worn away by friction against the pins.

It is not essential that the axes of the two pins 4 and 7 be maintainedthe same distanceapart' because there is room enough in the cylinder ofelther a steam or internal combustion engine for the stroke of thepiston should the distance between the axes of said pins be somewhatincreased. This permits me to adjust both of the inner brasses 6 and 9toward their respective pins sufficiently to keep all of the brassestight, and I will now describe the mechanism by which said brasses 6 and9 are automatically moved toward their respective pins to take up all"looseness due to wear and to maintain a predetermined tightness of saidpins in their re spective journals. 7 V

'Mounted with a close sliding fit between the stem-members 10 is a block15 which contacts the journal-brass6 on one side and is provided on itsopposite side with a screw- U threaded socket 16 within which thecorres'pondingly screw-threaded end of a shaft 17 is screwed. Theopposite end of the shaft 17 bears against the journal-brass 9, or morefrequently against shims 18 interposed between the journal-brass 9 andthe end of the shaft 17 The shaft 17 has a spline 19 extendinglongitudinally of. one side and mounted on the shaft 17 is a splitsleeve 19, the splineoi' 4 the shaft entering the split in the sleeve topivoted to the lower stem-member 10 at its junction with thecross-member 11 of: that yoke. Theend of the rod 2% which is passedthrough the bent lever 25 is screw-threaded and receives a nut 26.Between the nut 26 and'the adjacent end of the bentlever 25 is aspirally wound spring 27 which exerts 2.1

longitudinal pull on the rodfl2e determined;

by the position of the nut 26 on .the threaded endof said rod.

The bent lever .25 has an extension .28 in the direction of thecross-head ,pin 4:, and this extension may be made .to contact directlywith the pin, but preferably it is provided with a friction-wheel 29which makes the direct contact against pin 1.

Pivoted to the same stem-member 10 as the bent lever 25 but on the otherside vof the. cross-head pin 4, is a bent leverSO. One endo-f the lever30 is connected by a linkbar 81 with the pivot 23 of the pawl 22. Theother .end of .the .bent lever- 30 terminates above the cross-head pin4t and is provided near this end with a transverse opening through whicha rod 32 passes. The end of the rod 32 which passes through the bentlever 30 is screw-threaded to receive a :pair of nuts 33 and 34, whichare placed on opposite sides of theend of lever30 and theend of lever 30between said nuts terminates with a round head to permit of a lateralmovement of this end ofthe lever, between the two nuts, without beingbound between the nuts which are screwed up to make a close 'fit againstsaid rounded head. The opposite end of the rod 32 is pivoted ,to thebent lever 25, as shown in Fig.1. Theupper extension of the bent lever30 is provided with a lateral extension 28 in the direction ofcross-head pin i .and this -extension 28 has a friction-wheel 29 tocontact with the cross-head pin 4.

Any undue looseness of the journalbrasses at either end ofthe pitmanwill permit of a. longitudinal reciprocating movement of thepitmanasa'whole with eachrevolution of the crank and stroke of the p'iston whichwill impart a vibratoryzmovement to'the bent levers 25 and 80, This.moves't he dog 22 into position to frictionally engage the wheel 20 androtatessaid wheel the fraction of a revolution thereby correspondinglyMounted on rotating .the sleeve 19 and screw-shaft 17 causing the shafit1,7 to screw out of its socket in block 15 against the bearing-brass 9or -shirns1; 8., :and thereby tightening the bearing-,brasses at bothends of the pitman.

There-verse travel of the frictions-wheel 20 during the vibrations oflevers 25 and 30 which wouldhave a tendency to loosen thejournal-brasses, is prevented by a pawl 35 pivoted between a pair ofplates-36, also loosely mounted on sleeve 19. The pawl 35 ishel'dnormally in locking engagement with the friction-wheel'20by a spring 37wrapped around a fixed bar 738 and located between the pawl '35 anadjustable nut on the threaded-end. of'the bar 38.

VVhilethe two levers 2'5 and 30 are desirable for engines where thejournal-brasses of the pi'tman pins are required to run loose, forclose-running journals such as are most commonly used, one of saidlevers may be and is omitted. Preferably the lever 30 is retainedbecause it is shorter and consequently more rigid, and because it can beapplied easier and to better advanta e .to

the pitman. Sucilra modification is shown in Figs; 4L and 5 wherein theextension of thelever 3Q above the pivot is only sufiicient to supportthe friction-wheel 29 against pin-4. Ihe's prin g 27 around rod 2 & hasits inner bearing against a lug extension 42 from stem 12 of one of thestirrups. Fig. 4 also shows the use ,ofshims 40 and 41 between therespectiv ends of th st mps, and theiradjacent 'brasses to correctexcessive ep at on fitlh .p ns 4 and du to wear} The shims. aIeinsertedhand as needed! I have found O I e error in the operation oiflmyinvention .in practice which "I believe to be largely due {to theelasticity .of the metal from which the mechanism as above described is.constructed, and because of this error I was unable to, secure aregulated tightness of the jonrnal-brasses until "I discovered that byflattening the pin in the path of contact between it and the rollers 291could secure a constant limited vibration of lever 30 which had theresult of correcting the error above referred to. This n andtheesiibstitution of equi a nt as r- 7 having cylindrical sides and alsohaving a cam portion, of a pair of bearing-brasses disposed on oppositesides of the cylindrical portion of the shaft, means to move thebearing-brasses toward the shaft, and means contacting with the camportion of the shaft for actuating said bearing-brass moving means.

2. In a journal for rotary shafts, a pair of bearing-brasses dis osedupon opposite sides of the shaft, screw means to move thebearing-brasses toward the shaft, a wheel through which said screw meanspasses, pawls making driving contact with said wheel, and meanscontacting with the shaft for actuating the pawls.

V 3. In a journal for rotary shafts, a pair of bearing-brasses disposedon opposite sides of the shaft, screw means at right angles to the shaftto move the bearing-brasses toward the shaft, a wheel through which saidscrew means passes, pawls making driving contact with said wheel, andmeans comlprising a lever contacting with the shaft and connected withthe pawls to actuate the pawls.

4. The combination in a pitman with the cross-head and crank-pins, of apair of bearing-brasses for each pin disposed on opposite sides of thepin in each case, screw means extending longitudinally of the pitman tomove both inner bearing-brasses toward 7 their respective pins, a wheelthrough which said screw passes, pawls making holding contact with saidwheel, and means contacting with one of the pins for actuating thepawls.

5. The combination in a pitman with the cross-head and crank-pins, of apair of bearing-brasses for each pin disposed on opposite sides of saidpins, screw means extending longitudinally of the pitman to move bothinner bearing-brasses toward their respective pins, a wheel throughwhich said screw passes, pawls making holding contact with said wheel,and means comprising a lever contacting with one of said pins andconnected with the pawls to actuate said pawls.

In witness whereof, I have hereunto set my hand and seal atIndianapolis, Indiana, this 9th day of May, A. D. one thousand ninehundred and fourteen.

JOHN T. HAY. [11. 8.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

